Fountain pen



T621338 March 15 1927. M A I v FOUNTAIN PEN Filed Feb 15. 1926 MAX ATZ INVENTOR.

BY TM o7 A TTORNEYS.

Patented, Mar. 15, 1927. r.

rsz aee rarer 9mm Y MAX KATZ, OF PROVIDENGE RI-IODE ISLAND.

FOUNTAIN run. 7

, Applicatioiifiled ebruar 15, 1925. Serial no, 83,352.

My invention relates to fountain pens. The main object of my invention is to provide a nonleakable fountain penprovided v with means to furnish the desiredamount of ink to the writing end thereof.

The problem of feeding the desired amount of ink to the pen nib in fountain pens has always existed since thebeginning of foun tain pen manufacture. At first it was apparently thought that it was necessary to force the ink to the pen nib by compression of the ink sack in some manner to secure. a proper flow of ink, and practically all of the. earlier patents show some means for forcing the ink down to secure a proper flow thereof while writing. Then it was apparently dis- 7 covered that although the atmospheric pres sure would retain the ink inthe sack under ordinary conditions that once thefiow of ink of air to balance the volume in the sack to compensate for the volume of "ink withdrawn. Since then whether the manufacturer has known it or not fountain pens have 'been provided with some means to permit an equal influx of air to the ink sack. This has been accomplished in various manners, such as byproviding a layer of absorbent material underneath the pen nib, by providing a large ink and air groove on the front surface of the feed portion orin anyother manner so loosely joining the feed portion and neck portion together or the pen nib to the pen or the neekportion to the barrel'or otherwise that suflicient air may go into the ink sack to permit the'pen to write. The disadvantage of all prior constructions how ever, so far as the applicant is aware, has been that the air inlet openings have been too large or the joints have: to be so loose that so much air has been introduced throi' gh so. many places that the atmospheric balance has been disturbed and that the pen will leak. By providing an internal channel in the feed portion leading "from the ink sack to approximately the lower end thereof and by providing. two openings leading from the vfront surface of the feed portion to said channel of smaller diameter than said chair. nel and of approximately equal diameter, one

below said air inlet opening, I permitthe attached as usual between the feed portion an air inlet opening substantially in register with the air inlet opening in-the pen nib and the other anink outlet opening substantially in register with the usual split in the pen nib desired quantity of ink to be forced by the capillary action producedin writing through said ink outlet opening and an exact equal balancing amount of air to be introduced into said inksack through said air inlet open Having provided means to admitithe necessary amount of air to the ink sack to compensate for the volume of ink withdrawn in writing and it being no longer necessary to have loose joints to admit other air to said ink sack, it is obvious that the rest of the pen may be constructed in a nonleakable manner.-

To this end I preferably integrally secure the neck portion to the barrel portionto eliminate the leakage formerly caused at this oint and the unsteadiness in writin I 7 r r V 23 caused by thejoint'betweensaid portions becoming loose in use. The pen nib maybe and the inner periphery of the'neck portion 7 r and I preferably construct the inner periph ery of'the neck portion of a substantially. H

equal diameter to that of the outer periphery of the feed portion so that-there willbe no leakage at this point. As the feed portion is provided with a substantially central channel it is obvious that therewill he no discharges much below them below the" cen tre of the pen nib. Hitherto forsome reabeen provided with an internalshoulder to receive the lower end of the fed sack. It is for the lower endof the feed sack on the upper end ofthe feed portion andby constructing thepreferably curvilinear neck portion integral with the barrel portion that I have ink loss around eitherjoint for the channel i .951 -obvious byproviding the internal shoulder eliminated manysteps formerly thought nee essary in the manufacture of fountain pens and have almost out the cost of their manu-.

,facture half moulding the barrel and .neck portion integrally together, vparticular? celluloid or similar material.

understood from a description of'an embodition as may hereinafter appear'will be best-5;

went thereof such as is shown in the accom- V V panying drawings.

In the drawings, Fig. l is aside elevation of an assembled fountain pen constructed in accordance with my invention having the" I cap removed.

Fig. 2 is a longitudinal sectional view of the writing end thereof held in riting po sition.

' Fig. 3 is a dissembled side elevation of the feed portion and pen nib illustrating the location of the openings on the lower end ofthe feed portion.

Fig. 4 is aplan View of the feed portion. Fig. 5 is a side elevation of the feed portion. 7 v V Fig. 6 isa reverse plan View of the feed portion.

Fig. 7 is a plan View of the lower writing end of the. fountain pen. 7 I 8 is a side elevation of the lower Writingend ofthe fountain pen. 7

r Fig. 9v is a reverse planview' of the lower writing end of the fountain pen.

In the drawings, wherein like characters of reference indicate like parts throughout,

n10 generally indicates a fountain pen constructed in accordance with my invention. In the description and claims I refer to the position the fountain pen takes in use, the word upper referring to the closed end and the word lower referring to the writing end, the word front referring to the pen nib side and the word back referring to the opposite side therefrom. The pre-- ferred embodiment of nonleakablefountain pen shown contains the'usual tubular barrel a sack holding portion 12 preferably provided with a closed upper end 14 and an open lower end 16. The outer periphery of, the barrel 12 is preferably constructed of varying diameters to conform to the usual configuration. Said pen also contains theusual neck portion 18 which preferably terminates in the usual outwardly flaringannular flange 20. On a suitable position on the outer peripherv of the neck portion 18, I alsopref} erably providethe cap receiving thread 22.

' Though the neck portion 18 may be constructed separately from the barrel portion 12, I. preferably integrally secure the hollow upper end 24.0f the'neck port-ionrto the open lower end 16 of the barrel portion 12 in any suitable manner. Though the neck po'rtionis preferably of the usual curvilinear shape due also to its varying diameter, it obvious that it may throughout its length be of an approximately equal diameter or may be of any other suitable configuration.

A pen nib 26 of usual configuration is preferably attachedito, the lower end of said 7 pen 10. The pen 10 also "contains'the usual ink sack 28 provided with the usual, open lower; end-3Q to feedinkffrom said, ink sack 28 to s id a tf2l6i- .T, i -pro 1e mean suitably secure the pen nib 26 to said pen 10, I preferably provide the usual feed portion '32. Said feed portion 32 is of the general usual configuration, but differs from former-feed portions in the following particulars. 'The'upper end 34 thereof is provided with the sack receiving shoulder 36 ofsnia-ller diameter than the rest of the feed portion so that the lower open end 30 of saidfeed'sa'ck 28 maybe attached thereto. The central portion 38 is made if anything of a larger diameter than usual approximat underneath the lower portion ofthe pen nib 26. As explained, a main. feature of my invent-ion is to provide two openings in the duct 42 leading from the ink sack to the pen nib 26. The pen nib 26 is provided with the usual-writing end .44 having the usual split 46 therein extending upwards to the usual air inlet opening 48 located approximately centrally thereof.

To assemble the penit is obvious that the lower end 30 of said ink sa'ck28 is first expanded to fit around the sack receiving shoulder 36 on the upperend of the feed portion, the pen nib 26 is then laid on top of the front surface 50 of the feed portion and the feed portion with attached sack 28 forced inwardly of the neck portion 18 and the barrel 12. It is obvious that as the feed portion is approximately equal in diameter with the inner periphery of the neck portion that the upper end 52 of the pennib; 26 is thereby compactly secured to the fountain pen between the outer periphery 38 of the feed portion 32 and the inner. periphery 40 of the neck portion 18. Asusual I also preferably cut away as at 54 the lower rear end of the feed portion to make it conform to; the usual configuration of said portion.

As stated, I preferably provide means to admit a'suificient quantity only of air to the ink sack 28; while writing. To this end. I preferably construct'two openings 60 and 62 of. substantially smaller diameter than the ink. duct 42 and preferablyof. a substantially-equal size extendingfrom the front' surface, 50 of said, feed portion 52 to the lower. end of said channel 42,. one being an air inlet opening 60 which when the pennib 26 is inserted and thepen. properly assembled; as hitherto explainedwill besubstan tially in, register with the usual air inlet .opening 4801 the pen nib.aiidl .the other] an;

tially in register with the split 46 in the lower end of the pen nib 26 belowthe air inlet openin 48. .Thepen 10 may also be provided with a suitable usual lever 64 adapted to compress the plate 66 to exhaust all the air and other matter out of the sack- 28 and to cause a vacuum therein prior to dipping the lower writing end of said pen nib 26 into an ink well so that the atmospheric pressure may cause the 111k to flow into the vacuum formed in the ink sack 28 on release of said plate to fill said ink sack tion. When the pen is held in writing position and as shown in Fig. 2 used for writing, it is obvious that once the flow of ink has started due to the scratching of the pen point on thepaper 70, that the capillary action of the already laid ink 72 on said paper will draw the ink 74 from the ink sack 28 through the ink duct 42 through the ink discharge opening 62 and down the split 46in the pen nib to the pen point 47, and on to the paper 7 O. In order for the supply of ink 7 4 to continue evenly, I have provided the air inlet opening 60 of an approximatel equal size for this purpose. It is thus obvious that as ink flows downwards as just explained that an equal amountof air 76 to,

compensate for the ink removed will be introduced to said sack 28 through the usual air inlet. opening 48 in the pen nib 26 through the air inlet opening 60 in the feed portion 32 and up the ink duct 42 in the form of the bubbles 76 as shown in Fig. 2 (probably grossly exaggerated to show the action) and into the air space 77 then formed in the ink sack 28 above the level of the ink 7 5 therein. As this construction permits the exact amount of ink needed for writing purposes to be withdrawn from the ink sack 28 and a balancing amount of air introduced therein, the parts of the pen be ing of such a size that the balancing effect is produced without leakage, it is also obvious that I have so constructed my pen that influx ofair at the other points is no longer needed, and that it is therefore leak proof.

' As the ink duct 42 discharges much below the point of securement of the upper end. 52 of the pen 10 between the outer periphery oft-he feed portion 32 and inner periphery of the neck portion 18 it isobvious that there can be no leakage at this point. As the pen nib 26 is firmly secured to'the front surface of the feed portion, it is obvious that there can be no leakage at this point. As the neck portion 18 is preferably constructed integral with the barrel 12 it is obvious that there can be no leakage at this point. -It is thus obvious that I have provided a practically nonleakable fountain ,pen provided with suitable ineans'to feed ink in desired amounts for writing purposes;

It is understood that my invention is not limited to the specific embodiment shown and that various deviations may be made therefrom without departing from the splrit and scope of the appended claims.

What I claim as new and desire to secure by Letters'Patent is: j

1. A nonleakable fountain pen, comprising, an ink sack holding barrel portion having a closed upper end and an open lower end, a hollow neck portion having a cap receiving thread on the outer periphery thereof integrally secured to the barrel portion, a tubular feed portion having its central portion of approximately the diameter of the inner periphery of the neck portion, an ink sack receiving shoulder of smaller diameter at the upper end and an internal channel extending from the upper sack end thereof to approximately the lower end thereof having an air inlet opening of substantially smaller diameter than the channel extending from the front surface of said feed portion to said channel and an ink outlet opening of substantially equal size extending from the front surface of said feed portion to said channel below said air inlet opening, an ink sack having a lower open end attached to the shoulder onthe upper end of said feed portion and a pen nib having the upper end thereof secured to said pen between said neck portion and said central portion of said feed portion,

a downwardly projecting split writing end and an air inlet opening approximately centrally thereof substantially in register with the said air inlet opening in the feed portion.

2. A nonleakable fountain pen, comprising an ink sack holding barrel portion having a closed upper end and an open lower end, a hollow neck portion secured to the barrel portion, a tubular feed portion having an ink sack receiving shoulder at the upper end and an internal channel extending from the upper sack end thereof to approximately the lower end thereof having an air inlet opening of substantially smaller diameter than the channel extending from the front surface of said feed portion to said channel and an ink outlet opening of substantially equal size extending from the front surface 'of' said feed portion to said channel below said air inlet opening, an ink sack having a lower open end thereof attached to the shoulder on the upper end of said feed portion and a pen nib having the upper end. thereof secured to said pen, a, downwardly projectingsplit writing end and an air inlet opening approximately contained therein, a split pen nib secured the air inlet opening in the pen nib and the V to the lower end thereof having an air inlet other an ink outlet opening substantially in opening therein, an internal channel conregister with the split in the" pen nib below 10 n'ected to said ink sack and discharging said air inlet opening. underneaths'aid pen nil) in two substantially In testimony whereof I afi ix my signature.

equal relatively small openings, one an air I v inlet opening s ubstantially in register with MAX KATZ. 

